Telephone switching system



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April 9, 1968 H. H. ABBOTT ETAL 3,377,432

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TELEPHONE SWITCHING SY-STEM 30 Sheets-Sheet 6 Filed July 51. 1964 April 9 1958 H. H. ABBOTT ETAL 3,377,432

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Filed July 3l, 1964 April 9, 1968 H. H, ABBOTT ETAL TELEPHONE SWITCHING SYSTEM :50 Sheets-Sheet 8 Filed'July 3l. 1964 .05% Mom April 9, 1963 H. H. ABBOTT ETAL 3,377,432

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TELEPHONE SWITCHING SYSTEM April 9, 1968 Filed July 31. 1964 30 SheetsSheet -11 @mi 28me #5 April 9, 1968 H. H. ABBOTT ETAL 3,377,432

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TELEPHONE SWITCHING SYSTEM 30 Sheets-Sheet 16- Filed July 3l. 1964 April 9 1968 H.. H. ABBOTT ETAL 3,377,432

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